 #include <stdio.h>
   int main()
   {
          printf("hello ");

    FILE *f;
    f = fopen("scauScree.txt","a+");
    fprintf(f,"hello");
    fclose(f);
       float price;
       printf("int类型占用%d个字节.\n", sizeof(int));
       printf("变量price占用%d个字节.\n", sizeof(price));
       printf("实数3.14占用%d个字节.\n", sizeof(3.14));
       printf("字符串\"AB\"占用%d个字节.\n", sizeof("AB"));
       printf("表达式9+5的结果占用%d个字节.\n", sizeof(9+5));
       return 0;
   }